Strip-feeding device for box-machines.



2 BHBETSSHEBT 1.

E. JAGENBERG. STRIP FEEDING DEVICE FOR BOX MACHINES. APPLICATION FILEDDEC. 31, 1912.

1,125,330. PatentedJan.19,1915;

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Patented J. iaie s.

Application filediecember 31, 1912. Serial-No. 789524.

To all whom it may concern..-

Be it known that I, .itacrnsnno, a citizen of the Empire of Germany,residing at Dusseldorf, in the Empire of Germany, have invented a newand useful Strip-Feeding Device for Box-.Machinies, of which thefollowing is a specification My invention relates to strip feedingdevices for box-machines-of the class, in which the strip passing fromthe paper roll between a pair of pressing rolls is first plaited inseveral layers in a trough, then passed from the trough over-a gummingdevice around a driving drum, next intermittently drawn by means ofagripping device to the box blank and wound around the same after it hasbeen out before the box blank. When making large boxes such feedingdevices-present'the defect, that owing-to the great stroke of thegripping device such a considerable pull is suddenly produced in thegummed strip, that thelatter frequently breaks.

' My invention consists in improvements in such strip feeding devices,whereby the said defect is avoided.

One improvement consists in disposing the upper roll in the pairofpressing rolls in the free ends'of a pair-of horizontal levers rockingin the frame and in providing means for ralsing at will the pair ofhorizontal levers and thus lifting the upper roll off from the lowerroll, whereby the feed of the strip is stopped.

Another improvement consists in disposing the driving drum loosely onits shaft and in providing it with a spring-pressed pawl engaging aratchet wheel fastened on the shaft, so that the drum is permitted tofreely turn in one direction while folzlowing the pull of the strip.

A third improvement consists in disposing above the driving drum afur-rowed pressing roll adapted to roll on the gummed face of free endsof a pair of operating levers rocking in the machine frame and inproviding means for periodically rocking this pair of operating leversso as to press the furrowed pressing roll on the driving drum and tolift it off from the same. Means are provided for sweeping the rimsf-the furrowed pressing roll so as to remove the adhesive material andto protect the strip from sticking to the furrowed roll.

A fourth improvement consists in providing between the driving drum andthe grip ping device a pair of yielding levers with two gulding rollers,of which one'surroundmg the axis receives the gummed strip from thedrlving drum and the other guiding roller at the free ends of theyielding levers delivers the strip up to the gripping device. A. weightor spring tends to erect the yielding levers for tightening the strip,while these levers are adapted to yield to any excessive pull in thestrip by turning downward. I will now proceed to describe my invent1onwith reference to the accompanying drawings, in which Figure 1 is anelevation of the/improved strip feeding device for box-machines, and

2 is a plan view of the same.

Similar characters of reference refer to similar parts in both views.

In Figs. 1 and 2 only a par-t 1 of the frame of the box-machine isshown, which part 1 leaves space for a trough 9 below. The frame part 1carries a pin a, on which a paper strip roll 2 can be mounted in anyknown manner. A hanger 3 on the frame part 1 carries a shaft 4, which istherein mounted to turn and has fastened on it a pressing roll e at thefront and a step-pulley (Z at the rear. On a pin f carried by the framepart 1 a pair of horizontal levers 5 is made to rock, which at the freeend carries a pressing roll e adapted to bear under the pressure of itsown weight and that of the levers 5 from above against the pressing rolle. The two lovers 5 are rigidly connected with two vertical arms 2 whichpass through suitable openings in the frame part 1 upward and carryabove a cross pin 2. bolt 2 suitably guided on the frame part 1 passesunder the cross pin 2 and has a recess 2 in which the pin 2 can engage.

When the cross pin 2 engages in the recess 2 the upper pressing roll' eis permitted to freely bear on the lower pressing r 011 6, but when thebolt 2 by means of its upright arm seized with the hand is shifted tothe right, the cross pin 2 will move out of the recess a and ride overthe upper face of the bolt z, so that thereby the upper pressing roll 6is lifted off from the lower pressing roll 6. In a support 6 on theframe'part 1 a shaft 7 is mounted to turn, which carries a steppulley dat the front and a chain wheel 0 also a pulley 0 at the rear. Thestep-pulley cl is shown as connected with the lower steppulley d bymeans of a crossed lace t or the like andthe chain wheel 0 is shown asconnected by means of an endless chain a with another. chain wheel a(Fig. 1) on a shaft 8, which is driven from the box-machine in any knownmanner. endless chain a may be replaced by its equivalent, such as anendless belt or the like. In another support'9 on the frame part 1 onthe left 'a shaft 1 is mounted to turn, which has loose on it a drivingdrum is at the front and fastened a ratchet wheel m at the front side ofthe drum is and a pulley 0 at the rear. As the pulley 0 is connected bymeans of a crossed belt 0 with the above mentioned pulley 0, it will beseen, that the shaft 8 by means of the two chain wheels 0 0 and theendless chain 0 drives the shaft 7 which in turn by means of the twostep-pulleys d d and the crossed lace d drives the shaft 4'with thelower pressing roll 6 and by means of the two pulleys 0 and 0 and thecrossed belt 0 drives the shaft 11. with the ratchet wheel m. Thedirection of revolution of the shafts 8, 7, 4, n are indicated by thearrows shown in Fig. 1. As the driving drum is carries a spring-pressedpawl an) engaging in the ratchet wheel on, it will be seen that the drumis is normally taken along by the shaft n. In an arm 10 of the support 9and in another support 11 (omitted from Fig. 1) a shaft 9 is mounted torock, which has fastened on it two horizontal arms p p at the front anda pendent arm 1' at the rear. The two arms 77 p carry a furrowedpressing roll 1 which is adapted to hear from aboveagainst the drivingdrum is. The two arms 79 p are preferably provided with a cross holder tcarrying a wetted felt strip 25 or the like, which is adapted to sweepthe rims of the furrowed roll Z. Preferably the driving drum is isprovided with a cover of india rubber or the like. The pendent arm 1' ispivotally connected by means of a rod 7' with the upper arm of a lever1' rocking on the frame part 1. The lower arm of the lever r ispivotally connected with a rod 1' which is cranked in its right part andterminates in a fork r (Fig.

1) that is guided by a shaft 12 driven from 'the box-machine in anyknown manner. The shaft 12 carries a cam disk 8 against the periphery ofwhich a roller 13 on the rod 1* is constantly pressed by means of twohelical springs 14,14 connecting two opposite arms 15, 15 of the rod 1"with the frame part 1 in any known manner (not shown). As long as-theroller 13 rolls on the concentric portion of the cam disk 8 the furrowedpressing roll Z is to be lifted off from the drivin drum 70, but whenthe roller 13 engages 1n a recess of the cam disk 8 the two helicalsprings 14, 14 are to press the furrowed pressing roll Z on the drivingdrum is.

Of course the upper ends a guiding roller '2).

Between the trough g and the driving drum is a gumming device y isdisposed, the construction of which I do not specifically describe here,as it is immaterial to my invention.- The gumming device y comprises agumming roll h, two guiding rollers 16, 17 on the right and two guidingrollers 21 i on the left. Between the gumming device y and the drivingdrumk a support 18 is fastened on the frame part 1 and carries a pin wabove and an adjustable plate 19 below. The adjustable plate 19 carriestwo guiding rollers 20, 21 for the strip. On the pin 'w two yieldinglevers u u of a compensating looper are made to rock, which at theirlower ends are connected together by means of a weight 1: or the likeand carry. in their Another guiding roller w is disposed on the pin 10.On the frame part 1 is disposed a table 22 with a guiding table w, overwhich latter. a feeder m and a gripper a move. 23 denotes a cuttingdevice, 24 a driving roller of the winding device and 25 a box blankaround which the strip 6 is to be wound. I do not describe here thegripping device 00, w ,m nor the cutting device 23, or the windingdevice 24, as'all of them are known and form no part of my invention.

The strip feeding device described operates as follows: When thebox-machine is started and by shifting the bolt 2* to the left the upperpressing roll e -1s released, so that it bears on the lower pressingroll 6, the latter during its motion in the direction of the arrow willdraw the strip from the roll 2 and the strip b will be plalted down onthe bottom of the trough g in several layers, as is indicated by thedotted lines 1n Fig. 1. As the strip 6 passes from the trough g over theguiding roller 16, under the guiding roller 17, over the gumming rollerh, also-over and under the two gu1d-' ingrollersi i and 20, 21respectively, next around the driving drum is, under the lower guidingroller '11; and over the upper guiding roller '0 to the gripping device00 w m as indicated by the dotted lines, it will be understood, thateach time that under the action of the cam disk 8 the furrowed press ngroll I is pressed downward on the drivlng drum is the latter will drawthe strip out of the troughg over the gumming devicey, so that thegripping device a: w, m can seize the strip 1) and draw it to the rightthrough the opened cutting device 23, wh1le the box blank 25 workingwith the driving roller 24 in the known manner seizes the end of thestrip b and winds it on. As long as no pull prevails in the strip b, theweight '0 or the like will hold the pair of yielding levers u u in theirerect position shown in full lines in Fig. 1, but when during the strokeof the gummed strip 1) the pull will turn the yielding levers u udownward, say into the position indicated by the dotted lines and turnthe driving drum is more rapidlyin the direction of the arrow, thefurrowed pressing roll Z having been previously lifted off the drivingdrum is, so that the drum displaces itself relatively to the shaft n andits pawl m rides over the backs of the teeth ofthe ratchet wheel m,while the strip 1) can be easily drawn by the driving drum is out of thetrough g over' the gummi'ng device 1 without breaking. The india rubbercover 70 of the driving drum is greatly increases a sufiicient length ofthe strip has passed through the opened cutting device 23, the latter isoperated for cutting the strip as usual. v

The strip feeding device described can be varied in many respectswithout departing from the spirit of my invention.

I claim:

In a device of the class described for boxmachines, a-frame, a drum insaid frame adapted to guide a strip, means on said frame adapted tointermittently feed forward the strip through a length wherebya greatpull is periodically produced in the strip, a pair of levers rocking onsaid frame and carrying a strip-guide at their free end,

and means tending to erect said pair of levers for tightening the stripwhereby the pair of levers is enabled to yield to the varying pull inthe strip.

EMIL JAGENBERG. [n 5;

Witnesses: v HELEN NUFER,

ALBERT Nnrnm,

